Greetings --
There are some very important reasons that an OEM license costs so
much less than a retail license. OEM licenses are very limited:
1) OEM versions must be sold with a piece of hardware (normally
a motherboard or hard drive, if not an entire PC, although Microsoft
has greatly relaxed the hardware criteria for WinXP) and are
_permanently_ bound to the first PC on which they are installed. An
OEM license, once installed, is not legally transferable to another
computer under any circumstances. This is the best reason to avoid
OEM versions; if the PC dies or is otherwise disposed of (even
stolen), you cannot re-use your OEM license on a new PC. The only
legitimate way to transfer the ownership of an OEM license is to
transfer ownership of the entire PC.
2) Microsoft provides no support for OEM versions. If you have
any problems that require outside assistance, your only recourse is to
contact the manufacturer/builder of the PC or the vendor of the OEM
license. This would include such issues as lost a Product Key or
replacing damaged installation media. (Microsoft does make allowances
for those instances when you can prove that the OEM has gone out of
business.) This doesn't mean that you can't download patches and
service packs from Microsoft -- just no free telephone or email
support for problems with the OS.
3) An OEM CD cannot be used to perform an upgrade of an earlier
OS, as it was designed to be installed _only_ upon an empty hard
drive. It can still be used to perform a repair installation (a.k.a.
an in-place upgrade) of an existing WinXP installation.
4) If the OEM CD was designed by a specific manufacturer, such as
eMachines, Sony, Dell, Gateway, etc., it will most likely only install
on the same brand of PC, as an additional anti-piracy feature.
Further, such CDs are severely customized to contain only the minimum
of device drivers, and a lot of extra nonsense, that the manufacturer
feels necessary for the specific model of PC for which the CD was
designed. (To be honest, such CDs should not be available on the open
market; but, if you're shopping someplace like eBay, swap meets, or
computer fairs, there's often no telling what you're buying until it's
too late.) The "generic" OEM CDs, such as are manufactured by
Microsoft and sold to small systems builders, don't have this
particular problem, though, and are pretty much the same as their
retail counterparts, apart from the licensing, support, and upgrading
restrictions.
An Upgrade license requires that there be a license for an
earlier, qualifying operating system for the target PC, although that
OS need not necessarily be installed. It's quite possible to perform
a clean installation using an Upgrade CD. You'll be offered the
opportunity to delete, create, and format partitions as part of the
installation process.
Simply boot from the WinXP Upgrade CD. The Upgrade CD checks to
see if a qualifying OS is installed, and, if it finds none, it asks
you to insert the installation media (CD) of that OS. Unfortunately,
an OEM "Recovery/Restore" CD will not work for this purpose; you must
have a true installation CD, complete with the "\Win98" folder and
*.cab files, or the "\i386" folder of WinNT/2K.
Alternatively, or especially if all you have is an OEM Recovery CD
for the earlier OS, you can even start the upgrade from within the
current Win98/Me/NT/2K installation, and still elect to perform a
clean installation, to include formatting the drive. In this case,
there's no further request for the qualifying OS's installation CD,
because the installation routing "remembers" that you started from
within the qualifying OS. This process is more time-consuming, but
you get the same results: a clean installation of WinXP.
Bruce Chambers
--
Help us help you:
You can have peace. Or you can have freedom. Don't ever count on
having both at once. -- RAH
